Exhaust-steam injector



-N. T. MCKEE EXHAUST STEAM INJEGTOR Feb. l5 1927.

Filed Feb.1, 192e s sneets-sneetl n w m. m R F M n 5 E N L F b. l5, 19 Y l e 27 N. T.. MCKEE 1618135 EXHAUST STEAM IJECTOR Fi1ed-Feb.1, 1926 vs sheets-sheet 2' 75. f7? Aft-4L L Ma/fff ATTORNEYS 5 Patented Feb. 15, i927..

n'XAUsT-sTEA-M fINJEcToRi i Atpiiatibii .filed retina@ This inyentifoii"relates:'to steam; e l ot thetype primarily intended for operation by exhauststeai'n- 'froml an engine, ASuppliementedwhennecessary bv asupply ot liveI steam. The Vpr construction of controlling `devices or sys# tems for governing the admission ofthe live andiexliaust steam as well as the water to the n .v y I; 1.7 @l *I L Consid 'red more.' speciifically, one of the objects -oi' the.present inventionristo improve upoiif and siinplity'tllle construction ofy thev injector, control system shown in the United States 4Patent "ludl, grantedv l to Malcolm fHard leidii'igto the inject-or insteady of anV indirect control as shown in saidlpatent... Another obie'ct isto coinbinewith a plurality ofvalve controlled conduits, rasingle manually oper-z4 ablefA handle 4,anldf.mechanical `coniiet-tions therefrom for' ot Said l lconduits or successiont Ali' 1" 1' ot the injector by" first admitting exhaust in a predetermined order steam to 'the injector .for'beginning the estabf.

lishment' ot i theV jeftl' i instead of using live steamfthe` temper.ature.l ofthe injector beiiigmaintained'atfa lower degree hectare?` o'twvthe lower temperature ot the exhaust steam, greaterV condensation ot the steam e occurs Vand consequently a` higher vacuum and greater velocity of ltlow is secured..

These'and other objects such as simplicity,

andthere'jfore, low` co'stot construction, ,installation and maintenance will appear more fully vfrointlie .following moredetailed clescription and byv kreference to .theaccomoanj'-y ing-drawings forming afpart, hereof and vrliereinFigf lis a side elevation ot an in-r.Y

jector installation'V embodyingglmv invention to a locomotive, .the upper controlling valves being shown in section; Fig. 2 is a section states-'ff NEA? *iT/(A oriaionnrivnaitoiit; Yee-'ii' teatros;

incipal .object vof this invene tion is to improve upon and simplitythe y Y andl Yilliam, uclbeel,r March 24, 1925by. providing a direct con-v 1 rol for'tlie yvalves ot thelive steam conduits,

, directly actuating the valves ier objectifs to increase the etlicien'cyfy assiette? 'so anni' stiraaiii:'Aireit?I "A COLPRATION or Nnwf YORK.

i, i926. sei-iai no.l 85,133. j

on `ai@lineafact Fig; niels ist entrai vertical y section, through the "inj rect'or proper a plan view,partly rin, sectioin-'ot the injector,

.and Fig; .5 is .an enlarged sectional view of a different constructional example, thei parts shown in this view corresponding to the upper y,parts shown in ,sectionin Fig. l.

Two constructional examples are shown -in g i the drawings, the pre-ferredorin of Figs. 1 and 2 having a plurality of poppetvalves actuated by a cam shaft tol which the main c control handle is attached to open the ,supply pipes for the auxiliary andsupplementaryI live steam. An automatie valve and, a rev tarding valvefare interposed in thefauxiliary live' steam line; the retarding valve allowing the steam to pass to the water valve operating means to open the` water supply, after which, due to the building up of pressureon the retarding` valve, said valve opens to' admit the steam tov the automatic valve, An Y Vintrcepting valve yis interposedinfthe line from the automatic valve to theV steam chest or maiirsteam line of the engineand vis operated by .steamu'lrom the Amain valve casing' whichnis admitted to' the Aintereepting valve by the opening` of the emergency valve,

oneof the poppet valves Vabove referred fo;

The entiresystem 'ot valves is arrangedhtol v admit lthe water, exhaust steam and supple-V mentary live steam to` the vinjectorl succes@ sively. inthe order named. vUnder certain. conditions when it is-desired to operate 'theu injector asta livesteam injector independ-- successive Lopenings ,of ythe valves of the mainy valve casing` in the. vorder above set forth.

. United States Pat-ent No. 1,342,128, grant-ed' 1r Junel, 1920, to .,T.- Metcalf et al.` rlhis'type j in Fig. 3,l Ycomprises an 4outer casing in which there is' Forv convenience in description, the parts will be described under the following headings: Y

yThe injector A.

The main control B.

The retarding valve C.

The automatic valve D.

The intercepting valve E.

The injector A (Fig. 3).

F or the purpose of illustration l `have.

shownV my invention VVapplied yto an exhaust steam injector A of the type disclosed in the of injector, as shown-more clearly contained a main exhaust steam nozzle 11, a Water cone or'pr-eliminary mixing' nozzle 12 into which the Water issues with steam from themain exhaust steam nozzle; a combining;

Y nozzle 13, adelivery-nozzle 14; a further-pre y the conduit 18; a valve 19 beingV liminary mixing nozzle 15 between the lWater cone 12 and the combining nozzle k13; and

Va supplementarylive steam nozzle y16. EX?

haust 'steam from the engine is led to the exhaust steam chamber` 17 of the injector by or nozzle 24 by Which it is directed into the exhaust Isteam chamber 17 to flow therefrom to the main exhaust steam nozzle 11. A conduit 25 leading from the Watertanlr is j connected with a small casing 26 provided With a Water valve 27 which valve controls the fiovv of vWater from the pipe 25 through 7 the casing 26 to the Watercone 12 ofthe injector. Y y

The admission of exhaust steam through theV conduit 13, `of Water through the conduit 25 and of live steam through the conduits 2O and 21, is underv the control of a single manually operable main controlling deviceY and other instrumentalities Vpresently to bedescribed.

The Water valve27 is adapted to be nor- ,-mally held to its seat by the pressure of the water Within the pipe 25 and to be opened against said pressure by ay fluid pressure responsive device, Which may be of any suitable construction, .but Which is shown as a piston 23 suitably secured to the stem` 27a of thevalve 27 and mounted Within a cylinder 'said valve.

small piston 34 mounted in a cylinder 35 provided to assist in holding the'valve 27 normally to its seat and a bleed pipe 32`leads from the cylinder 29 for permitting'the escape of any Water of condensation which might otherwise collect Within the cylinder 29 and interfere with the opening of Athe valve.V Y

V'lheexliaust steam valve 19 is normally held to its seat by a small spring 33 and a fluid pressure responsive device of any suitable construction is provided for opening As shown, this deviceconsists of formed in thercasing of the injector A, the Vpiston 34 being provided With a piston rod vadapted to contact With the valve 19 and raise it off its seat when steam or other fluid under pressure is Aadmitted to the cylinder 35 through the pipe V37. The pipe 37 I leads from the cylinder 354 to the casing "of -the 26. small pipe Y or stem 36 Which projects upwardly and is Sil automatic valve D and steam isadmitted to said pipe in a manner be described.

Y rThe main control B (Figs. 'I and i which will hereinafter t of poppet valves Which for convenience vvill be designated as the mainvalve 42, the supplementary valve 43 and the emergencyY valve 44 Which control, respectively, the admission of steam to the pipe V45 leading to the retarding valve C, the conduit 2O for the supplementary live steam and theY outlet to which is connected the intercepting valve E. Each ofthe poppet valves 42, 43 and 44 has sW'ivelly connected thereto the lower end of a valve stem 47, the upper end of Which stem is slidably mounted in a central bore of a bonnet 48; the bonnet being detachably mounted in the Vvalve .casing to enable the valves to be readily Withdrawn from thercasing and replaced or rebound Whenever necessary., Each of the valve stems .47 is further provided With a pair of laterally projecting lugs 49 adapted toV be engaged by a cooperating cam surface fori ed on the cam shaft 50. Three cam 54 are provided, to actuate the main valve 42, the cam surface 53 serving to actuate thesupplementary valve 43 and the cam surface 54 serving to actuate the emergency valve 44. The cam shaft 50 is rotatably mounted in suitable bearings and has one end reduced as at 55. This reducedend projects through a stufling box 56 and has secured to its outer extremity to the live steam turret yof theV surfaces 52, 53 and the cam surface 52 serving pipe 75' and then L the closed positions shown in the will' flow throu "has lift-ed said valveof its seat.

mits'the live steam from the valve lpipe 30 to the fluid y water -valve 27'to open the water valve and provide aclearancesp'ace `forv a purpose presently to be' described. Assuming thert'hrottle'of the engine toi be open and steam under Vpressure to be' present inthe main steam line or steamchest or" the engine, the steam O'h the pipe 80l into theval've casing 76 and, ifvthe emergency valve laV is closed, such steam will oa'usethe valve 82 "tobe movedto the left in Fig'. l gandinto contact'jwithta valve seat formed on the right-,hand face 4of the web 84; the steam passing through the'valve casing 76 tothe ce2 to the compartment 72 tor hold the fluid ber 7l inits loweripositionas shown in F ig. l.l If, however, they opened, the pressure of the live steam issuing .frolnthe main control casing LlOwillniov-e the piston 8l toward the right (in Fig. l)

emergency valve 44 is` passagev (ill to-the automatic,valve: D.Y ItV 'at this time the throttle .of the engine is f opened and live steam under pressure isf present in the main steam line'of the engine or the steam chest, the pressurev of such steam is communicated vthrough the pipe 8O,` the intercepting valve casing 76 andthe n to the compartment 72v and will holdfthe fluid pressure responsive member 7i. inits lower position as shownin-Fig. i of thel drawing. The trapping ot the steam,.whi'ch leaks pastthe piston 69, b-etween the upper surface of the piston and the lower surface pipe y 75 ot' the valve member 7l, the Vdownward pres#` and cause the valve `member 82 to contact* with avalve seat formed upon the cap or closure 85 at the right-hand casing 76, thus closing the pipe 80 -and pre,- venti'ng the steam pressure within said pipe from acting upon the fiuid pressure responsive member 71'. When this occurs, the steam within the pipe 75 and the compartment 72vis vented to the atmosphere through the smallV pipe '86 connected to thervalve casing 7G; the steam passing rthrough the clearance space between the valve stem 83 and the central bore of the web 8,4.

Operation.

The operation of the device shown in Figs. 144, inclusive, is as follows:

Vhen the main control handle 57 is in the oftpposition shown inull lines in Fig. 2, all of the various valve members will be in drawing. When it is desired to start the injector, the main control handle `57 is rotated in the direction of the arrow shown in Fig. 2, to the position designated latter position, the camfsurta'ce 52 has engaged the laterally projecting lugs49 of the valve sterne? for Ythe main valve .l2 and This percasing 4l() to flow through the pipe 45, such steamy iirst flowing through the tubular sleeve 62 of the retarding valve C and thence through the pressure means for the permitthe water from the conduit 25 to flow into the injector. As the steam whichlows into the cylinder 29 of 'the iuid pressure mined pressure, as for example,

member of thewater valve is trapped, the steanipressure builds up rapidly in the pipes 30 and 45 and when it reaches a predeter- 50 pounds per square inch, the retarding valve is opened and the steam passes throughthe side of the valvel Auxiliary. In this cam surface sure of thisv steam upon the piston, and alsofy theVV downwardpressure of the steam in thev automatic valve casing uponlf'the rvalve 65,

will hold vthe valve 55 A thus permitting the steam which passes from soY in itsl'o'wer position.,V

thepipe 45 Vto theautomatio valve casing to i'ow around the valvestem 70 and upwardly into the pine 37. This steam owingmto the pipe 37 actuatesA the piston 34 for the exhaust steam valve 19, forcing said piston upwardly and raising the exhaust steam valve 19 otl" its seat, thus'iiermitting exhaust steam from the conduit 18 to iiow into the injector. A

Undercertain conditions, the pressure of the exhaust steam may be sulieient to establsh the jet, but, however, it' the steam pressure of the exhaust steam is not sulioient to establish and maintain the jet, the control handle 3?V is thrown to the position designated Supplementary7 in Fig. 2. In this kposition ot the main control handle, the` valve 43 to be opened, thus permitting al portion ot the live steam from the casing 40 automatic valve casing through the passage (illV will raise the valve member 65 out of Contact with its lower seat @Gand intocontact with its upper-seat 67, as hereinbefore described, thus shutting oil the'tlow of live steam through the pipe 37 tothe fluid pres# 53 causes the supplementary sure means for the exhaust steam valve 19 and permitting the live steam which flows into the automatle valve casing to flow through the auxiliary live steam conduit 2l'v and through the auxiliaryV live steam nozzle 24 to the exhaust steam chamber 17 vofthe injector; the live steam entering the chamber 17 'flowing into tbe moin exhaust Vsfteain` :noz-

v Zlelllandfthe yinjector now voperating entire- 'ly'uponllvooleoml., :5

f, Certain Conditions`- exist from time, ,toitinie Vwliilr'tliere may able on, exhaust Stettin l.oli very; lovvfpreesure lf: it is necessary to; operate i the injeetor at suoli tiniee, the y control h andle. is l,tlirown Q -oi' the drawing.

Inftliis' .,position the ,calinQsurfnee 5Llfwill raise'tlie ein ergenoyVzilye'r l lfpleinentary vzilvefll stillbeing maintained y openbyfthe 'cani surfaces 5 2 and 53. .They

B= and vthe.intereeloting valveE and ille conL neetions from these valves are `identical with those desoribedabove in \eonn`e`ction.. \\"th the be no eiiliaustf Stettin avail-I toifore explained, peiniitstlie live Stettin from ting, -of tzlle Supply of'lro Stoom Pino .SQito .tliopno 7:5-, fwith'thepartsin thls position,y as there will'be'no epreSSLre-`upon theiluid, pressure responsive ineinber" boil. 5265,wvlllbomov-@Molto,oppor POS 'lo thus ermitting; Alive `{Stezinrl to frlovvJA through ed piston ei the tlieleugiliztry live jsteain .eonduit andthe nduit QOQand the dui t 2 l.

Y. the 'modifica i on eliovvnin Fia.. 5,1' lieve olulotituteol plurality .of Valves .Connected in tandem A*lor the poppetvcilvosyof Jn.:y l "Ae 'shovmgthe valve easing 4,0, iis, provided with alplurality of seat'slSlO, 91gl nndyvitli Wliieli the ,main ,valve 42%, "the supplementary Vnlvefcf 14nd ltlieQeinergeney valve Mire- WV speetively are adziptedto cooperate. VThe f 5, Vtho'. Casing" V,76 ot the ,einorgonoy ,.valve directly -.connected fito the sor'ewtlirejaded vleziding'toV tlie'retar'ding rvalve C nndjtliecon- 'G9 vclliitflO, for tliesupplementary live steani are secured reepeetively tof suitable serewtllrolb ed lperturee loe'ate'd between tlievzilrveseats r" und the valve 3through the Soiplmentery live steamoooa auxiliary live Stettin' oonl niitsf the opened'.

Lhandl e' ind .V--l'ye stein vplfelinerjitry vilve 143% permitting the Stefani.

J'vetovxto.; Sadnjooto, effe manually oplerv. avlile ,'eontiolli1ig` device ande plurality: of' velves governed Vthereby klto cante the; t" the. oxhaoot `Steam and' .the live steam? admitted r`to j the in] eotor y Tlie combination Witlian injeetorlmving a vlve ionti Vconnected theretofor' the adi ande valve Controlledoon ySion of Steam, to saidjinjeetor, 'of fluidfpres- Conduit, und

-vent`ad1ni5eion of fluidv underv prei,

eonetruotional V'ei;zinfl-jole,.shown in Fig-."1 of* the dra\v1ng. 'The operetionoftlieplurality o'fvalves shown in Fig. 5 will be readily understood,- thenmain valvejl being opened first by therotation oftlie4 main control han dle and the steaiinliowingfirst .totlie piper l5 before the lostl motion reconnection 95, perl 75 Supplementary valve Q43@ to, vr,be i Further rotaetion of {tlie ofontijol a. yvill open. tliefsuptoillowfto the Supplementaryliversteainconduit 120.; the"v lost vmotion eonneotion, 9'( pre'- ing ofi .the on`1-rgohoyflye l theeontrol handle iv opened to its `full opened)p osition. .r It Vivi-ll be understood tlratmanyehnges,

and modifications ofthe construeof ni'y 'in vention 11 l Tlfno oooiloriotionwth an; oxhastfsteam `njolotor hvng a pllillelityV ,of Conduite for i 'Supplyingehauet Steam,`ilivesteani",end

era

"-25 Tlie'eonibinationWitllfain'iehll 10U ingeetor having-fa valve' controlled condfuit Lconnected thereto 4for the adiniSSionp vvnter, y and L Valve controlled conduit yfon the, d'ins- Sion of/ steam, to said injector, oli fluidfj'pressure operated ineens toaetuate vthe vlve's of said conduits, ainain control to adinitfluid under-fpressureto, said niegtnsand a retniding y devicev dpreventopenng of'tlie`valveffor Seid StennrConduitibefore the 'valve ofS'aid watereonduit is opened. 5 v l sureooerated nieai'is to' act'ute tlieylyefofy said Conduite, a main' 'controLa' pipe leading ooininru-,lioeting with Said 'pipmene offsaid 'Y bronches leading to the AHuid preESni'eQ-nifeaiis l2 for the Valve oi' said Witten-oonduititndilie othery of sfdbranehes 'lending to tli'eg iui'd pressure mons vortlio' 'alveoffsaidpstem` reta'rldmg valvlootedlboj tween said pipe and jipair of brz 1`n e liau'st Steuinfvulve o' -eratln'ovrwater, exhaust steam,

with tor supplying r spectively water and steam, to said injector', ot a fluid pressure actuated valve for ach 'of said' conduits, a pipe connecting the fluid pressure actuated 5` means tor each of said valves with a sourceV of fluid under pressure, and a'i'etarding` valve Ito prevent thev passage of fluid to the means for actuatingl saidsteanivalve, bei'ore said Y vwater valve is opened. i

5. The combina-tien with an exhaust steam vinjectorhaving a plurality of conduits connected therewith't'or supplying respectively supplementary and vauxiliary live steam,`to said injector, ofl a l` liuidpress'ure actuated valvev for said water l conduit,"an` automatic valve for controlling Ythe vadmission of the auxiliary live steam and lexhaust steam to said injector .in alternation 'Y "only, a' main valve, a connection leading .from said main valve to said automatic valve and. to the fluid pressure actuatedy water valve and a retarding valve interposed loe tween .said main and automatic valves'to Y @preventtheV passage of .stea'in'to said auto-` matic valve until said water valve is opened.

y K rilliecombiifiation with asteam injector 'having a kpair ot'conduits connected therewith for supplying respectively. water/andl steam to said'f injector, oi a tluidpressure f so N'actuated valve for each of said, conduits, a pipe connecting the ,tluid pressure actuated V:means-toi"each of .said valves With-asource of' fluid under pressure, and ar retardinp,l

f valve to prevent the passage of fluid tothe "35, means for actuating` said steam valve, before lsaid water valve is opened, said retarding 'valvecomprising a tubularsleeve liavinga valve seat connected*theretoand a spring to hold said'fretai'ding valve closed until the pressureof said fluid upon .said valveseat reaches a predetermined point. V V 7. The combination nf'itl'i an injector, having' connected therewith a pluralityof con-V .,duits for 'supplying respectively water, ex-

haust steam, supplementary and auxiliary live steam lto said injector, oi. fluid pressure operated means for actuatingI the' valves'tory sai-d waterand exhaust steam conduits,'an automatic valve for admit-ting liversteam alternately to 'said auxiliary conduitrand to for' the exhaust Vthe Fiuid pressuremeans p control having a steam valve anda main 'pluralityV of valves mounted therein to admit .fluid under pressure to said automatic valve and directly to said conduit. Y j. n 8. The combination with an exhaust steam j injector having` connected therewith a 4'plusupplementary live steam rality ofconduits for supplying respectively water, exhaust steam, vsupplementary Y live steam andauxiliary live steam to lsaid inv l-jector, of a main control, fluid j Y erated valves for said water,exhaust steam pressure opandauxiliary live steam conduits, said main control comprising aY main valve by which ,ing and the exhaust valve l and the admission of fluid under pressure to said `pressure operated valves iscontrolled, j a valve Vfor admitting. live steam directly to said supplementary live steainconduit, and

mechanicalactuating means associated/with j and common to said .last-'named valve and said main valve( 9. The combinationtwith an exhaust steam I injector having` connected therewith. a pluralityof conduits for admitting respectivelyV supplementary and auxiliary'live steam and Vexhaust steam to said injector, of an' auto-l matic valve for permitting the admission of auxiliaryvlive steam yand exhaust steam to said Vinjector vin alternation only, said 'automatic valve including a fluid pressure responsive member, a connection leadingt'rom the autoniaticvalve to a steamlinfeoilvan engine the pressure with in which is'normally indicativefot the steam pressure of the exhaust steam supplied to theinjecto'r, and

an -intercepting valve interposed in said 'convnection vfor .shutting 'oli the fluid pressure 4therein from saicliluid pressurerresponsive member.r p l l' 1.0. The coinloination`Y with, anexhaust steam injector having connected therewith aV plurality Y of .valvev controlled lconduits, for supplying respectively Water, e'xhaustnsteain,

supplementarylive steam -and auxiliary live steam to-said injector', offa Amain control comprising a valve'casing, a main valve, a supplementary live. `steam` valve j and an emergency valvefm'ounted therein, a single'. ymanually operable' control handle and inefw10077 chanical connectionsassociated therewith for .operating said valves y directly'by vthe actuation ofsa'id handle..

ll. TheVV combination with an exhaust, r

Ysteam injector fhavinga plurality ol3 valve controlled conduits connectedtherewith for supplying respectively water, exhaust steam,

.supplementary live steam, and auxiliary live .steam to ksaid injector, of a inaiircontrol valve casing, fluid pressure actuated Vvalves 'for said water conduit and said exhaustste'ain conduit, connections leadingffrom said casingrto the fluid vpressure means for said valves', a valve interposed between said kcascperated auto matically by fluid under pressure from the main steam line of the enginejfor normally controlling automatically the .admission of v4steam to said injector in alternation.through said'exh'aust steam conduitand throughrsaid auxiliary live steam ccnduit, and a retarding` d supplying re-V exhaust steam, supplemeniaiY valve for said Water conduit, an automatic" l controlling the admission of the auxiliary actuated water valve,

l duits' Y in Vthe main steam lineof anj'engine to per.-` :mit the admissionr of live steam and exhaust.l

vpressure of the live steam 'automatic valve.

" tively' sup live steam and exhaust steam to said injector in alternation only, a main valve, -a'connection leading' from said main valve to said automatic valve and to the fluid ypressure and a retarding valve interposed'between said main and auton'iatic valves to prevent the passage otsteam tojsaid automatic valve until said water valve is opened,'said retarding valve being' provided vwith arestiicte'd passageway toreduce the flowing i to s said 13.' The Combination `with an exhaust steam injector,u of a main control valve casingconnected to a source of live steam under pressure,` a pair of conduits leading from said casing to said injector, one of said consupplyiiig auxiliary.` and the other, supplementary, live lsteam to said injector, a lam shaft mounted Within said casing, a pair of valves for controlling the admission of steam to said conduits and a Vsingle manually operable handle for actuating' said Ycam shaft and valves.

14. The combination lwith an -.exhaust steam injector'havingconnected therewith a plurality/of conduits foradinitting respeclementary and auxiliary" live steam and exhaust' steamto said injectonof an automatic valve for permittingthe admission of auxiliary live steam and exhaust steam' to said injector in alternation only,

said a'utomaticvalve including a `Huid pres# surel respoiisiveniember, a connection leading from the automatic valve to a steam line Vof ian engine the pressure within which is normally indicative of the steam pressure of the exhaust steam supplied tol the injector, an intercepting valve interposed vin said connection for shutting' off the fluid pressure therein from said fluid pressure i responsive member and a'main control including a pluralityof` valves for I governing the admission ofsteam to said automatic valve, to said supplementary live steam conduit and to' said intercepting` valve. y j i A control system for an'exhaust steam injector inivhichfis. provided a main control for controlling' mission' respectively of Water,1live 4matic valve controlledby thesteam pressure steam to said injector normally in alterna- "tiononl'y, characterized by the provision of' an vemergency -'valve for shutting Yoff the steam pressure to the automatic valve and thereby causesaid' injector to loel operated as a rive steaiiifinjector.

1G. A control systemifor an rexhaust steam thev admissionV of fluid u'n-Y dery pressurejto lactuate the valves forthe ad-rv j steam .and` L .exhaust steam to said injector, and an autof 18, in which injector in which .is provided a mainV control steam injector in which is provided a: main controlfor controlling` the admission offluid under pressure to actuate tlievalves for the admission.' .respectively of water, live steam andexliaust steam to `said injectoiganeautovmatic valve anda connection from the-live steam line of anr engine to said automatic-l valve, characterized by the provision of 'an intercepting valve interposed in saidconnec- 7 tion and an emergency valve operated by said main control to admitV fluid under pressu'reto said intercept-ing valve to cause it to close said' connection. j

18. Apcontrol systemfor an 'exhaust steam injector in which is provi led a main'control for controlling the admission oflvvaten'supf pleinentary and auxiliary live steam and yexhaust steam to said injector, an automaticv valve to controlthe admission of auxiiiary live steam and exhaust steam to said injector' in alternation, and a connection from said automatic valve to the main steamlin'e .of an engine normally to admit steam to said automatic valveand prevent it from permitting the admission of auxiliary live steam -ivhen exhaust steainis being admitted to said in jector, characterized by the Y provision` of 1 a fluid pressure operated intercepting'valve in said connectioma inainvalve' to admit ,aux-v iliary live steam to saidautomatic .valve, a

ygencyv valve are actuated lby Y a Asingle manu- 'ally operable control handle;

` 20. A control 'system as set forth in' ola-ini y18, inivhich a i'etarding valve is interposed between said mainvalveand automatic valve to prevent the passage of the'auxiliarylive steainto said 'automatic' *vz'rlve*before Vthe VWater. admitted toJsaid injector f y 21. A controllsystem'- as set' fortjhxiii claim 18, in'ivl'iich a fl-'uid "providedjfoii z ictuating` the lvalve for the admission 'of' Water to said' injector, and a pipe leading to sz'iidmeans isunder thecon trol of said main valve; 4

22. Avcontrol' systemfas set forth inclafinx a fluid pressure operated means is provided, for 'actuating the valve for the admission of-Wat'er to said injector, a pipe connects said main valve, `l `aut'omatic v valve izo pressure operated' means and said meansanda retai'ding valve isinl terposedbetween said mainland automatic valves to prevent the admission of fluid to said automatic valvebe'lore said water valve isopened. v y Y Y 23. The combination with an exhaust steam injector, of a main control comprising a casing connected to a supply of live l steam,.an auxiliary live steam conduit and a 'Y single manually operable control handle forl supplementary live steam conduit connect-ing,`

said casing and injector, an automatic valve in' said auxiliary livesteam conduit, a retarding Valve ,between 4said automatic valve and said casing, a pairof valves in'said casing` toy control the admission of live steam to said auxiliary and live'steam conduits, and a actuating` said pair 'of valves.

24. The combination with an exhaust steam injector having` valve controlled conduits connected therewith for the admission j of water and exhaust steam to said injector,

of fluid pressure means for actuating said valves,`a main valve'casing connected with as'up-ply of live steam, an auxiliary live steam conduit anda supplementary live steam con-` duittconnecting` said casing and injector, an

T automatic valve in said auxiliary live steam conduit bet-Ween said casing and injector, a retarding valve between. said automatic valve and casing, fluid pressure operated means for the Vwater and exhaust .steam valve, a pipe connecting said retarding valve Vand thefluid pressure means for said water valve,and a second pipe connecting said yauy Y tomatic valve and the fluid Y pressure lmeans for. the exhaust steam valve.

25. The combination with an exhaust steam injector having Vvalve controlled con? duits connected therewith for the admission of wate'rrand exhaust steamtosaid injector, of fluid vpressure means'for actuating said valves, a main valve casing connected with a supply of' live steam,ran auxiliary live steam conduit and a supplementary'live'steani conv duit connecting saidfcasing and injector, an automatic valve in said auxiliary live steam Vconduit between Vsaid casing` andinjector, a 'retarding :valve between said. automatic valve Vand casing, fluid pressure operate@LV means for thewater and'exhaust steam valve,

. a. pipefconnecti'ng:said retarding valye and the fluid pressure ineanslfor said water valve, a pairof pipesconnected to said automatic `valve,'o`ne' leadinof to the fluid pressure means for-saidexhauststeam valve and the other vto the main steaiii'li'neA of the engine, and an interceptng-valve interposed in said *o-tliei'j pipe vand in commuiiicationwith said casing.

26. The combination wit-ligen exhaust vsteam' injector having valve controlledicon- V duits connected therewith forrtli'e admission n of water and exhaustk steam tojsaid injector,

of v fluid pressure means forV actuating' said valves, a main. valve casing connected with a supply oflive steam, an auxiliary live steam conduit and a supplementary live steam conduit connecting said casing and injector, an automatic valvein said auxiiiarylive steam conduit between said casing and injector, a retarding valve between said automatic valve and casing, fluid pressure operated means for Y the waterland exhaust steam valve, a pipe connecting` said retardingvalve and the fluid pressure means for said water valve, a pair of' pipes yconnected to'said automatic valve,

one leadingl vto the fluid pressure means for.'

said' exhaust steam valve andtheV other to the main ,steam line .of the engine, and an intercepting valve interposed in said other pipeand in communication with said casing, Y and a. main valve, a supplementary liveV steam valve and an emergency valve mounted in said casing for controlling the admission of live steam respectively to said auxiliary live steam conduit, to said supplementarylive steam conduit and to -ceptinp` valve.

2T. A combinatioiras set forth in claim 2G, in which said casing has mounted therein a cam shaft having a plurality of cam sui'-V said injector, and a pipe lin-e connecting saidk said `interautomatic Vvalve with a source of fluid under pressure, of an intercepting valve 'casing interposed in said pipe line between said auto-V matic valve and said source of fluid, said valve casing being provided with three ports,

one of which communicates with the auto-` Vmatic valve, one with'the source of fluid Vunder pressure andl onewith the atmosphere, and a valve within said'casing for alternately placing,- either oic the two last mentioned ports inrcoinmiinication with the first named'port, n Y

29. The combination with an exhaust steam injector having l conduits connected therewith for supplyingrlive.steain and'fexhaust steam to said injector, an automatic valve for controlling` the'admission rof live Y and exhaust steam through said conduits to said injector, and a pipe line 'connecting said automatic valve with a source yof fluid underv pressure, of' an intercepting valve interposed:

iii said line between said automaticy valve and said source of fluid under pressure, said valve comprising al casing` having);l a vent' leading to the atmosphere, 'and afvalve membei' movable to either of two positions, in one of which said vautomatic valve is inlcommunieation with the atmosphere through said vent, and in the other of'Which said communication is shut off. v

30. The combination With an-injector prilnaril)7 -intended for operation by'- exhaust steam from an engine and having conduits connected therewith for supplyingV exhaust steam to said injector and live steam, an automat-ic valve for controlling the admission of steam through said conduits to said' in-l jector in accordance with the operating con ditions of said engine, and a pipe line connecting lsaid automatic valve. with a steam line of the engine in which the pressure conditions areindicative of the pressure of the exhaust steam delivered Ato the injector, of

an intercepting valve interposed in said pipe line having a vent leading lto the atmosphere and a valvemmember for establishing communicationbetween said vent and the autoi when said automatic valve isfoperating' under normal conditions.

NEAL rr. MCKEE. 

